<template>
  <div class="star" :class="starType">
    <span v-for="starItem in starItems" class="star-item" :class="starItem">
    </span>
  </div>
</template>
<script type="text/ecmascript-6">
const STAR_LENGTH = 5;
const CLS_ON = 'on';
const CLS_HALF = 'half';
const CLS_OFF = 'off';
export default {
  props: {
    size: {
      type: Number
    },
    score: {
      type: Number
    }
  },
  computed: {
    starType() {
      return 'star-' + this.size;
    },
    starItems() {
      let result = [];
      let score = Math.floor(this.score * 2) / 2;
      let hasDecimal = score % 1 !== 0;
      let tempLength = Math.floor(score);
      for (var i = 0; i < tempLength; i++) {
        result.push(CLS_ON);
      }
      if (hasDecimal) {
        result.push(CLS_HALF);
      }
      while (result.length < STAR_LENGTH) {
        result.push(CLS_OFF);
      }
      return result;
    }
  }
};
</script>
<style lang="stylus" ref="stylesheet/stylus">
  @import '../../common/stylus/mixin'
  .star
    font-size 0
    .star-item
      display inline-block
      background-repeat no-repeat
    &.star-48
      &.star-item
        width 20px
        height 20px
        margin-right 22px
        background-size 20px 20px
        &:last-child
          margin-right 0
        &.on
          bg-image('star48_on')
        &.half
          bg-image('star48_half')
        &.off
          bg-image('star48_off')
    &.star-36
      &.star-item
        width 15px
        height 15px
        margin-right 6px
        background-size 15px 15px
        &:last-child
          margin-right 0
        &.on
          background-image url('star36_on@2x.png');
        &.half
          bg-image('star36_half')
        &.off
          bg-image('star36_off')
    &.star-24
      &.star-item
        width 10px
        height 10px
        margin-right 3px
        background-size 10px 10px
        &:last-child
          margin-right 0
        &.on
          bg-image('star24_on')
        &.half
          bg-image('star24_half')
        &.off
          bg-image('star24_off')
</style>
